added support for 3DES encryption algorithm in IKE

src/charon/config/proposal.c

@@ -549,6 +549,7 @@ proposal_t *proposal_create_default(protocol_id_t protocol)
 	{
 		case PROTO_IKE:
 			add_algorithm(this, ENCRYPTION_ALGORITHM,   ENCR_AES_CBC,    128);
+			add_algorithm(this, ENCRYPTION_ALGORITHM,   ENCR_3DES,         0);
 			add_algorithm(this, INTEGRITY_ALGORITHM,    AUTH_HMAC_SHA1_96, 0);
 			add_algorithm(this, INTEGRITY_ALGORITHM,    AUTH_HMAC_MD5_96,  0);
 			add_algorithm(this, PSEUDO_RANDOM_FUNCTION, PRF_HMAC_SHA1,     0);

src/charon/doc/Todo-list.txt

@@ -60,6 +60,7 @@ Todo-List for charon
 
 + use dpdaction/dpddelay parameters from ipsec.conf
 / add firewall script support
+- do not link unneeded libraries in bins
 - include only a minimum of NATD payloads
 - implement 3DES to load encrypted pem files
 - implement a "event bus" mechanism

src/libstrongswan/Makefile.am

@@ -16,6 +16,7 @@ crypto/signers/hmac_signer.c crypto/signers/hmac_signer.h \
 crypto/signers/signer.c crypto/signers/signer.h \
 crypto/crypters/crypter.c crypto/crypters/crypter.h \
 crypto/crypters/aes_cbc_crypter.c  crypto/crypters/aes_cbc_crypter.h\
+crypto/crypters/des_crypter.c  crypto/crypters/des_crypter.h\
 crypto/hashers/hasher.h crypto/hashers/hasher.c \
 crypto/hashers/sha1_hasher.c crypto/hashers/sha1_hasher.h \
 crypto/hashers/md5_hasher.c  crypto/hashers/md5_hasher.h \

src/libstrongswan/crypto/crypters/crypter.c

@@ -25,6 +25,7 @@
 #include "crypter.h"
 
 #include <crypto/crypters/aes_cbc_crypter.h>
+#include <crypto/crypters/des_crypter.h>
 
 
 /** 
@@ -58,6 +59,11 @@ crypter_t *crypter_create(encryption_algorithm_t encryption_algorithm, size_t ke
 		{
 			return (crypter_t*)aes_cbc_crypter_create(key_size);
 		}
+		case ENCR_DES:
+		case ENCR_3DES:
+		{
+			return (crypter_t*)des_crypter_create(encryption_algorithm);
+		}
 		default:
 			return NULL;
 	}

src/libstrongswan/crypto/crypters/crypter.h

@@ -31,17 +31,19 @@ typedef enum encryption_algorithm_t encryption_algorithm_t;
 /**
  * @brief Encryption algorithm, as in IKEv2 RFC 3.3.2.
  * 
- * Currently only the following algorithms are implemented and therefore supported:
+ * Currently only the following algorithms are implemented:
  * - ENCR_AES_CBC
- * 
- * @todo Implement more enryption algorithms, such as 3DES
+ * - ENCR_DES
+ * - ENCR_3DES
  * 
  * @ingroup crypters
  */
 enum encryption_algorithm_t {
 	ENCR_UNDEFINED = 1024,
 	ENCR_DES_IV64 = 1,
+	/** Implemented in class des_crypter_t */
 	ENCR_DES = 2,
+	/** Implemented in class des_crypter_t */
 	ENCR_3DES = 3,
 	ENCR_RC5 = 4,
 	ENCR_IDEA = 5,
@@ -50,9 +52,7 @@ enum encryption_algorithm_t {
 	ENCR_3IDEA = 8,
 	ENCR_DES_IV32 = 9,
 	ENCR_NULL = 11,
-	/**
-	 * Implemented in class aes_cbc_crypter_t.
-	 */
+	/** Implemented in class aes_cbc_crypter_t */
 	ENCR_AES_CBC = 12,
 	ENCR_AES_CTR = 13
 };
@@ -74,9 +74,10 @@ typedef struct crypter_t crypter_t;
  * @ingroup crypters
  */
 struct crypter_t {
+	
 	/**
 	 * @brief Encrypt a chunk of data and allocate space for the encrypted value.
-	 * 
+	 *
 	 * @param this				calling object
 	 * @param data				data to encrypt
 	 * @param iv				initializing vector
@@ -138,8 +139,10 @@ struct crypter_t {
 /**
  * @brief Generic constructor for crypter_t objects.
  * 
- * Currently only the following algorithms are implemented and therefore supported:
+ * Currently only the following algorithms are implemented:
  * - ENCR_AES_CBC
+ * - ENCR_DES
+ * - ENCR_3DES
  * 
  * The key_size is ignored for algorithms with fixed key size.
  * 

src/libstrongswan/crypto/crypters/des_crypter.h

@@ -0,0 +1,58 @@
+/**
+ * @file des_crypter.h
+ * 
+ * @brief Interface of des_crypter_t
+ * 
+ */
+
+/*
+ * Copyright (C) 2006 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef DES_CRYPTER_H_
+#define DES_CRYPTER_H_
+
+#include <crypto/crypters/crypter.h>
+
+
+typedef struct des_crypter_t des_crypter_t;
+
+/**
+ * @brief Class implementing the DES and 3DES encryption algorithms.
+ * 
+ * @b Constructors:
+ *  - des_crypter_create()
+ * 
+ * @ingroup crypters
+ */
+struct des_crypter_t {
+	
+	/**
+	 * The crypter_t interface.
+	 */
+	crypter_t crypter_interface;
+};
+
+/**
+ * @brief Constructor to create des_crypter_t objects.
+ * 
+ * @param algo		ENCR_DES for single DES, ENCR_3DES for triple DES
+ * @return				
+ * 					- des_crypter_t object
+ * 					- NULL if algo not supported
+ */
+des_crypter_t *des_crypter_create(encryption_algorithm_t algo);
+
+
+#endif /* DES_CRYPTER_H_ */